Absence of Voltage Indicator with Communication Network Based Secondary Power Source

Abstract

A system for the detection and indication of both the absence and presence of voltage is described. The system has a voltage detector module, a voltage indicator module, and a communication network based continuous secondary power source configured to enable the voltage indicator module to positively indicate the absence of voltage in the primary circuit. In some embodiments, the system can positively indicate the presence of voltage in the primary circuit such that the positive detection and indication is powered by the primary circuit itself. In some embodiments, the positive detection and indication of voltage can also be powered by the communication network based secondary power source.

1 . A system for the detection and indication of voltage for a primary circuit comprising:
 a voltage detector module;   a voltage indicator module; and   a continuous secondary power source configured to enable the voltage indicator module to positively indicate the absence of voltage in the primary circuit.   
     
     
         2 . The system for the detection and indication of voltage for a primary circuit of  claim 1  wherein the continuous secondary power source is a communication network based power source. 
     
     
         3 . The system for the detection and indication of voltage for a primary circuit of  claim 1  wherein the continuous secondary power source is a power-over-Ethernet source. 
     
     
         4 . The system for the detection and indication of voltage for a primary circuit of  claim 1  wherein the voltage indicator is configured to positively indicate the presence of voltage. 
     
     
         5 . The system for the detection and indication of voltage for a primary circuit of  claim 4  wherein power for the positive indication of the presence of voltage is derived from the primary circuit.